Modified food starch is another name for modified corn starch, and it's an additive that's made by treating starch, which changes one or more of its physical properties. The starch can come from corn, but can also be made from wheat, potato, rice, or tapioca. It's added to foods to act as a thickener, to acquire a certain texture, or to keep foods moist. It's typically added to processed foods such as sauces, pie fillings, and gravies. This ingredient adds no nutritional value to food.